Fig. 3

a Temperature profiles for different values of S and A with Pr = 0.72, Le = 0.66, β = 0.02, \( \gamma \) = 0.01, Mn = 10, ε ₁ = ε ₂ = 0.2, \( {\theta}_{\mathrm{r}}^{\hbox{-} 1} \) = −5, Nb = 0.1, Nt = 0.1. b Temperature for different values of \( \gamma \) and A with Pr = 0.72, Le = 0.66, β = 0.02, S = 4, Mn = 10, ε ₁ = ε ₂ = 0.2, \( {\theta}_{\mathrm{r}}^{\hbox{-} 1} \) = −5, Nb = Nt = 0.1. c Temperature profiles for different values of ε ₁ and Pr with Le = 0.66, S = 10, β = 0.02, γ = 0.01, ε ₂ = 0.1, A = 0.2, \( {\theta}_{\mathrm{r}}^{\hbox{-} 1} \) = −5, Mn = 10 d Temperature profiles for different values of Nb and Nt with Pr = 0.72, Le = 0.66, β = 0.02, γ = 0.01, ε ₁ = ε ₂ = 0.2, \( {\theta}_{\mathrm{r}}^{\hbox{-} 1} \) = −5, Mn = 10, S = 4